gandcrab | 40014d7acbc86a699a7015c9b890ea08a564b045efc0d35ddb9132f548b9f84d

General

Target

ok.exe
Size

257KB
MD5

7aa37e1425f48ca148f1a0b356162c89
SHA1

e3cce5e265d5db34f4a7586476bd42064f47484e
SHA256

acec132d40282e6e2af84055cd69e4e39914f516570f06dc69be30f06e3517f8
SHA512

44c813eb2ee619bb62d9b32af70d36b9b546c6b2ed6d5a1ddbcc2ec32798f0319916a3dc25b213bcca9234e2b12d6f532a47ee747411a6af5747c638e6090b3b

Score

10^/10

gandcrab backdoor persistence ransomware suricata

Malware Config

Signatures

GandCrab Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1576-55-0x0000000000400000-0x0000000000B17000-memory.dmp	family_gandcrab
behavioral1/memory/1576-59-0x0000000000400000-0x0000000000B17000-memory.dmp	family_gandcrab
behavioral1/memory/1576-60-0x00000000002E0000-0x00000000002F7000-memory.dmp	family_gandcrab
behavioral1/memory/1576-62-0x00000000002E0000-0x00000000002F7000-memory.dmp	family_gandcrab

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor gandcrab
suricata: ET MALWARE Observed GandCrab Ransomware Domain (ransomware .bit in DNS Lookup)
suricata: ET MALWARE Observed GandCrab Ransomware Domain (ransomware .bit in DNS Lookup)
suricata
suricata: ET MALWARE Observed GandCrab Ransomware Domain (zonealarm .bit in DNS Lookup)
suricata: ET MALWARE Observed GandCrab Ransomware Domain (zonealarm .bit in DNS Lookup)
suricata

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ok.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	ok.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\scpslcujpzf = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ok.exe"	ok.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

ok.exe

description	ioc	process
File opened (read-only)	\??\A:	ok.exe
File opened (read-only)	\??\B:	ok.exe
File opened (read-only)	\??\I:	ok.exe
File opened (read-only)	\??\M:	ok.exe
File opened (read-only)	\??\E:	ok.exe
File opened (read-only)	\??\F:	ok.exe
File opened (read-only)	\??\J:	ok.exe
File opened (read-only)	\??\R:	ok.exe
File opened (read-only)	\??\U:	ok.exe
File opened (read-only)	\??\G:	ok.exe
File opened (read-only)	\??\K:	ok.exe
File opened (read-only)	\??\N:	ok.exe
File opened (read-only)	\??\O:	ok.exe
File opened (read-only)	\??\S:	ok.exe
File opened (read-only)	\??\W:	ok.exe
File opened (read-only)	\??\Z:	ok.exe
File opened (read-only)	\??\H:	ok.exe
File opened (read-only)	\??\L:	ok.exe
File opened (read-only)	\??\P:	ok.exe
File opened (read-only)	\??\Q:	ok.exe
File opened (read-only)	\??\T:	ok.exe
File opened (read-only)	\??\V:	ok.exe
File opened (read-only)	\??\X:	ok.exe
File opened (read-only)	\??\Y:	ok.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

ok.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ok.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ok.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	ok.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

ok.exe

pid process

1576 ok.exe
1576 ok.exe

pid	process
1576	ok.exe
1576	ok.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

ok.exe

description	pid	process	target process
PID 1576 wrote to memory of 928	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 928	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 928	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 928	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 732	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 732	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 732	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 732	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 656	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 656	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 656	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 656	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1768	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1768	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1768	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1768	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1840	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1840	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1840	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1840	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1964	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1964	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1964	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1964	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 472	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 472	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 472	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 472	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1936	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1936	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1936	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1936	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 588	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 588	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 588	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 588	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1784	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1784	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1784	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1784	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1640	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1640	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1640	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1640	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 2040	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 2040	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 2040	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 2040	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1616	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1616	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1616	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1616	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1524	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1524	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1524	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1524	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1868	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1868	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1868	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1868	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1352	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1352	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1352	1576	ok.exe	nslookup.exe
PID 1576 wrote to memory of 1352	1576	ok.exe	nslookup.exe

C:\Users\Admin\AppData\Local\Temp\ok.exe
"C:\Users\Admin\AppData\Local\Temp\ok.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1576

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:928

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:732

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:656

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1768

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1840

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1964

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:472

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1936

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:588

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1784

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1640

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:2040

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1616

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1524

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1868

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1352

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1244

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:632

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:440

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:752

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:644

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1572

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1072

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1684

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1596

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1592

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1160

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:536

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:900

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1960

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1048

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:948

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1672

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:792

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:2008

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1120

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:896

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1476

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1552

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1548

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1484

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1380

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1180

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:272

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1060

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1756

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1480

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:2032

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:1816

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:276

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1488

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1604

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:912

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:1364

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1800

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:608

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns1.cloud-name.ru
2⤵
PID:552

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns2.cloud-name.ru
2⤵
PID:832

C:\Windows\SysWOW64\nslookup.exe
nslookup zonealarm.bit ns2.cloud-name.ru
2⤵
PID:1096

C:\Windows\SysWOW64\nslookup.exe
nslookup ransomware.bit ns1.cloud-name.ru
2⤵
PID:1496

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/272-106-0x0000000000000000-mapping.dmp

Download
memory/276-112-0x0000000000000000-mapping.dmp

Download
memory/440-81-0x0000000000000000-mapping.dmp

Download
memory/472-69-0x0000000000000000-mapping.dmp

Download
memory/536-90-0x0000000000000000-mapping.dmp

Download
memory/552-119-0x0000000000000000-mapping.dmp

Download
memory/588-71-0x0000000000000000-mapping.dmp

Download
memory/608-118-0x0000000000000000-mapping.dmp

Download
memory/632-80-0x0000000000000000-mapping.dmp

Download
memory/644-83-0x0000000000000000-mapping.dmp

Download
memory/656-65-0x0000000000000000-mapping.dmp

Download
memory/732-64-0x0000000000000000-mapping.dmp

Download
memory/752-82-0x0000000000000000-mapping.dmp

Download
memory/792-96-0x0000000000000000-mapping.dmp

Download
memory/832-120-0x0000000000000000-mapping.dmp

Download
memory/896-99-0x0000000000000000-mapping.dmp

Download
memory/900-91-0x0000000000000000-mapping.dmp

Download
memory/912-115-0x0000000000000000-mapping.dmp

Download
memory/928-63-0x0000000000000000-mapping.dmp

Download
memory/948-94-0x0000000000000000-mapping.dmp

Download
memory/1048-93-0x0000000000000000-mapping.dmp

Download
memory/1060-107-0x0000000000000000-mapping.dmp

Download
memory/1072-85-0x0000000000000000-mapping.dmp

Download
memory/1096-121-0x0000000000000000-mapping.dmp

Download
memory/1120-98-0x0000000000000000-mapping.dmp

Download
memory/1160-89-0x0000000000000000-mapping.dmp

Download
memory/1180-105-0x0000000000000000-mapping.dmp

Download
memory/1244-79-0x0000000000000000-mapping.dmp

Download
memory/1352-78-0x0000000000000000-mapping.dmp

Download
memory/1364-116-0x0000000000000000-mapping.dmp

Download
memory/1380-104-0x0000000000000000-mapping.dmp

Download
memory/1476-100-0x0000000000000000-mapping.dmp

Download
memory/1480-109-0x0000000000000000-mapping.dmp

Download
memory/1484-103-0x0000000000000000-mapping.dmp

Download
memory/1488-113-0x0000000000000000-mapping.dmp

Download
memory/1496-122-0x0000000000000000-mapping.dmp

Download
memory/1524-76-0x0000000000000000-mapping.dmp

Download
memory/1548-102-0x0000000000000000-mapping.dmp

Download
memory/1552-101-0x0000000000000000-mapping.dmp

Download
memory/1572-84-0x0000000000000000-mapping.dmp

Download
memory/1576-54-0x0000000000CAF000-0x0000000000CC9000-memory.dmp

Filesize
104KB

Download
memory/1576-60-0x00000000002E0000-0x00000000002F7000-memory.dmp

Filesize
92KB

Download
memory/1576-59-0x0000000000400000-0x0000000000B17000-memory.dmp

Filesize
7.1MB

Download
memory/1576-58-0x0000000000CAF000-0x0000000000CC9000-memory.dmp

Filesize
104KB

Download
memory/1576-61-0x0000000000CAF000-0x0000000000CC9000-memory.dmp

Filesize
104KB

Download
memory/1576-62-0x00000000002E0000-0x00000000002F7000-memory.dmp

Filesize
92KB

Download
memory/1576-56-0x0000000075721000-0x0000000075723000-memory.dmp

Filesize
8KB

Download
memory/1576-55-0x0000000000400000-0x0000000000B17000-memory.dmp

Filesize
7.1MB

Download
memory/1592-88-0x0000000000000000-mapping.dmp

Download
memory/1596-87-0x0000000000000000-mapping.dmp

Download
memory/1604-114-0x0000000000000000-mapping.dmp

Download
memory/1616-75-0x0000000000000000-mapping.dmp

Download
memory/1640-73-0x0000000000000000-mapping.dmp

Download
memory/1672-95-0x0000000000000000-mapping.dmp

Download
memory/1684-86-0x0000000000000000-mapping.dmp

Download
memory/1756-108-0x0000000000000000-mapping.dmp

Download
memory/1768-66-0x0000000000000000-mapping.dmp

Download
memory/1784-72-0x0000000000000000-mapping.dmp

Download
memory/1800-117-0x0000000000000000-mapping.dmp

Download
memory/1816-111-0x0000000000000000-mapping.dmp

Download
memory/1840-67-0x0000000000000000-mapping.dmp

Download
memory/1868-77-0x0000000000000000-mapping.dmp

Download
memory/1936-70-0x0000000000000000-mapping.dmp

Download
memory/1960-92-0x0000000000000000-mapping.dmp

Download
memory/1964-68-0x0000000000000000-mapping.dmp

Download
memory/2008-97-0x0000000000000000-mapping.dmp

Download
memory/2032-110-0x0000000000000000-mapping.dmp

Download
memory/2040-74-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads